Find the farthest distance that a man aboard the ship (whose eye level is 5m above water line) can go so that a light house 32m high will still be visible (at least the top of it is visible)? Consider the error of curvature and refraction.
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Find the farthest distance that a man aboard the ship (whose eye level is 5m above water line) can go so that a light house 32m high will still be visible (at least the top of it is visible)? Consider the error of curvature and refraction.
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- The tip of a tower of 210m height is just visible above the horizon from an observer with an eye height of 1.35m. What is the distance between the tower and the observer considering curvature and refraction? show complete solution.Neglecting the effect of tide and waves and considering the effect of curvature and refraction, determine how far out to sea a yacht will be, when a light on its mass 55m above the water disappears from the sight of a lifeguard on shore whose eye level is 1.685m above the water.A man standing on a beach can see the top of a lighthouse 25 km away. If the eye of the man is 1.5 m above sea level, then determine the height of the lighthouse above sea level considering earth’s curvature and refraction correction.
- Compute the combined effects of curvature and refraction on level sights of 20, 200, 400, 800, and 1600 ft.Determine the combined effect of curvature and refraction on level sights of 30, 50, 100, 250, 300, 500, 1000, and 2000 m.How wide would the river be if a man 1.8 m. high stands on the other bank of the river and still he could see a tower on the opposite bank of the river which is 30.50 m. high considering the effect of curvature and refraction?
- Two hills 100 km apart has elevations of 80 m and 230 m respectively. What would be the minimum height of tower that could be constructed at B so that it would be visible from A considering the effect of curvature and refraction correction.Based from the Figure, a vertical angle of +13°45’ is read to a target 1.23 m above point B. The measured inclined distance S is 823.29 m and the elevation of point A is 123.65 m above the datum. The height of the instrument at A is 1.35 m. Consider the effect of earth’s curvature and refraction. Determine the difference in elevation between A and B Determine the elevation of BTwo hills 90km apart has elevation of 60m and 200m. What would be the minimum height of the tower that could be constructed in any of the hills so that it would be inter-visible from each other considering the effect of curvature and refraction?ANSWER KEY: h= 23.7918m
- Readings on a line of differential levels are taken to the nearest 2 mm. For what maximum distance can the Earth’s curvature and refraction be neglected?Please just give answer quick: Calculate the equivalent correction for curvature and refraction if the distance is of 1 km on the curved surface.A woman standing on a beach can just see the top of a lighthouse 25 km away. If her eye height above sea level is 1.65 m, determine the height of the lighthouse above sea level. Taking into account the effects of curvature and refraction.